cherevoy



UNITED sTATEs PATENT oEEioE.

E. B. GHEREVOY, OF NE\V YORK, N. Y.

MACHINERY FOR CUTTING VENEERS, co.

Specificatn of Letters Patent No. 6,326, dated April 17', 1849.

To all @l1/omit may concern.'

Be it known that l, E. B. CHEREVOY, of the city, county, and State ofNew York, have invented new and useful improvements in the Machine forCutting Veneers and other rl'hin Sheets of Slabs of lVood from Blocks,&c., and that the following is a full, clear, and exact description ofthe principle or character which distinguishes them from all otherthings before known, and of the manner of making, constructing, andusing the same, reference being had to the accompanying drawings, makingpart of this specification, in which- Figure l is a front elevation ofthe machine; Fig. 2, a horizontal section taken at the line (A a.) ofFig. l; Fig. 3, a similar section taken at the line (B of Fig. 4; Fig.4, a vertical section taken at the line (C, c) vof Fig. 2; and Fig. 5 avertical section through the central shaft.

The same letters indicate like parts in all the figures.

The principle or character of my invention, which distinguishes it fromall other things before known, consists in cut-ting veneers o-r othersheets or slabs of wood (from a block or blocks of wood) by means of aradial knife (or knives) which has a longitudinal vibratory motion tomake a draw cut, as it is termed, when this is combined with a ro tatingarm (or arms) and feeding box which carries the block (or blocks) ofwoodto be cut, which arm (or arms) revolve and carry around the feeding boxto carry the block around over a circular platform in which the knife(or knives) slides, the revolution of the block and the vibration of theknife constituting the compound motion necessary to effect what iscalled the draw cut. And my invention also consists in combining withthe feeding box (or boxes) a feeding wheel, that is a ratchet and cogwheel that turns freely on the shaft which carries the arm (or arms) orthe feeding box (or boxes), the cogs of which engage a cog wheel on ascrew attached to a follower that forces down the block, the saidfeeding wheel being in turn combined with an arm (or arms) that carriesa ratchet hand or pawl and connected with a shaft within the mainvertical shaft that carries the feed box, that the said ratchet hand orpawl may be operated above by a motion independent of the main shaft tocommunicate the required feed to the block from which the veneers are tobe cut.

ln the accompanying drawings (a) represents a horizontal-platformdivided into four quadrants (a, o, a, am) two of them (a, Co) arepermanent, and the other two ((r, am) are movable and rest on a seriesof set screws (Z9) which pass through the bed (c) of the said platform,by means of which screws the surface of the two quadrants (CW, am) canbe elevated or depressed to determine the thickness of veneers to becut, as t-he amount of depression of these quadrants belowT the plane ofthe stationary quadrants will determine the depression of the blockbelow the cutting edges of the knives to be presently described. Tworadial spaces are left between the permanent q uadrants (a, a) and themovable ones (6a, am) for the formation of a throat (d) for the passageof the veneers, and for the cutting edges of the two knives (e, e).These knives are made each of a flat plate of metal wit-h a cutting edgein the usual manner, and are fitted to slide radially in appropriaterecesses in the platform and bed, and to project beyond the outerperiphery of the bed. The cutting edge is placed on a level with theupper surface of the permanent quadrants, and facing the adjustablequadrants, and the end that projects beyond the periphery of theplatform is pierced with a hole to receive the rounded end of a lever(f) (one for each knife) which is hung on a fulcrum (g) the upper endbeing fitted to a cam groove (7L.) in the surface of a cylinder (i) onthe end of a horizontal shaft (j) provided with a fast and loose pulley(7c, Z) to receive a belt from some first mover by which the machine isoperated. The cam grooves, one for each knife, are so formed and placedon the shaft relatively to the other parts of the machine that while theblocks of wood, from which the veneers are to be cut, pass over theknife, the two grooves run in an oblique direction to slide and give theknives the required vibrations while cutting, and when the veneers arecut the grooves run in the direction of the periphery to keep the knivesstationary while the blocks in their revolution again approach them, thegrooves run obliquely in the reverse direction while making the nextcut, and then again in the direction of the periphery to oin the firstdescribed portion. In this way it will be seen that the knives onlyslide or vibrate during the passage of the blocks over them.

On the driving shaft there is a bevel cog wheel (m) which engages acorresponding bevel wheel (a) on a vertical shaft (o) which turns on astepin the center of the platform, and the lower end of this shaftcarries two arms (p, 79) the outer ends of which are lboxes (f7, Q) ofsufficient capacity to receive the blocks of wood from which the veneersare to be cut. these boxes is fitted a follower (r) that rests on theblock of wood, and provided with a screw (s) which passes up through ahole in the top of the box; and to this screw is fitted a nut havingcogs on its periphery which are engaged by the cogs of what I term thefeed wheel (u) that turns freely on the vertical main shaft, so that bythe turning of this feed wheel, by reason of its connection with thecogged nut and screw the follower is either depressed or elevated. Solong as the feed wheel turns with the main shaft and with the samevelocity the follower will not move, but if it be made to turn fasterthen the follower will be depressed and with it the block of wood, andvice versa. Itis necessary therefore that this feec'ling wheel shouldreceive an independent motion greater than the rotation of the shaft atthe time that the block of wood passes over one of the adjustablequadrants for the purpose of forcing down the block of wood to give therequired feed. This is effected in the following manner. On the upperface of the feed wheel there is a circle of ratchet teeth (c) acted uponby two hands or pawls fw, lw) jointed to two arms (m, on a hub (y) thatis capable of vibrating to the required extent on the main shaft; andthis hub is connected by a short arm or pin that passes through andworks freely in a short horizontal slot in the main shaft, the said armor pin being simply a projection from the lower end of a rod (6') Withinthe main shaft which is made hollow for that purpose. This rod passesout at the top of the shaft and is there provided with two horizontalarms (0, 0') which are acted upon by two tappets (cZ, (Z) on the drivingshaft, and as the main vertical shaft receives its motion from thedriving shaft it is necessary that the tappets on the driving .shaftshould act Y on the arms 0. 0 at a Oreater distance from the axis of thedrivingshaft than the distance of that part of the arms (0, 0') actedupon are from the axis of the main vertical shaft, for if they were atlequal disceac tances the two would of necessity move with equalvelocity, and not give the required motion, And as it becomes necessaryfrequently to vary the thickness of veneers to be cut t-he tappets (CZ,cl) project from a hub (e) that is secured to the shaft by means ofscrews passing through elongated holes in the hub, so that the distanceof these tappets from the axis of motion of the main shaft can beregulated at pleasure to make the feed correspond with the requiredthickness of veneers to be cut, which thickness is also gaged by theadjustment of the quadrants te, am). The arms (as, that carry theratchet hands or pawls are drawn back after the required feed has beengiven, and preparatory to a repetition of the operation by means of ahelical spring f) attached to the hub of the arms and the main shaft.

It will be obvious from the foregoing that the details of thearrangement of Lmy invention may be varied without changing in anydegree the principle of my invention, and l therefore do not wish toconfine mylself to the precise arrangement herein specified although itis in my judgment the most effective.

What I claim as my invent-ion and desire to secure by Letters Patentis-- 1. Sllie method of cutting veneers, substantially as hereindescribed, by means of a knife (or knives) having a longitudinal slidingor vibrating motion during the operation of cutting, when this iscombined with a box (or boxes) on a rotating shaft that by itslrevolutions it may carry the block to and over the knife, substantiallyas herein described, whereby the operation of cutting veneers by meansof a sliding or vibrating knife to give the draw cut, may be madecontinuous, as described.

2. And I also claim the method, substantially as herein described ofcommunicating the feeding motion to the follower (or followers) in thefeeding box (or boxes) by means of the arms (or arms) so connected withthe main shaft, or the equivalent therefor, that it may have a motionindependent thereof, and connected with the follower (or followers) inthe feed box (or boxes), and operating as herein described, or in anyother manner essentially the same in principle.

E. B. CHEREVOY.

Witnesses AUGT. P. THARP, A. P. BnowNn.

